MOSCOW (Reuters) - Kremlin spokesman Dmitry Peskov on Monday described as groundless and unobjective an assertion by Poland's defense minister that foul play was behind a 2010 plane crash that killed the then Polish president.

He said the circumstances of the crash were well known and had been the subject of official investigations.

"Based on all that, we can call such statements groundless, unobjective, and not having anything in common with the real circumstances of this tragedy," Peskov said.